The Church Dio Padre Misericordioso (Jubilee Church) was constructed using a new technology called photocatalytic cement. It essentially is concrete that cleans itself. As the UV in sunglight hits the photocatalytic cement, oxidation is accelerated in the concreate which speeds the rate at which pollutants that come onto the surface of the concrete decompose. Inorganic materials don’t stick to the concrete that well and organic molecules break down.
More information about this church is at: